Ventilated sight rib for firearm barrels



J. CROWE fee. 2, 1947.

VENTILATED SIGHT RIB FIREARM BARRELS Filed April 11, 1946 Patented Dec. 2, 1947 VENTILATEDSIGHT megs-cs FIREARM manners .Iohn stir-warm. :J 05, 1 .11. Mo-eassignorito ;Harry Moneymaker Omaha, Nebr.

Application Apriltll, 1946;SeriaI'-No.=661;22'8

'1 "This invention relatesto firearms, the primary obiect ofthe-invention being to provide a ventilate'd sight -rib for "firearms that will dissipate athevbarrelr-of thetfirearmtand the sightszthereof,

the rib serving as a sight plane'tforthe shooter's eye in directing the course of his shot.

Another'impor'tant object of the invention is to provide a rib of this character secured to the :;gun barrel in such-away as-to-permit of the-ready 7 apcsitioning and-adjustment or the Sight ribyand :at the :same time permit of free elongational :ex-

i ansi'on-and contraction of the gun barrel due to heat in firing, without transmitting stress, distortion or damage to the barrel or rib. With the *f foregoing and other objects in view which-will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing Figure l is a fragmental elevational view illustrating a gun barrel equipped with a ventilated sight rib, constructed in accordance with the invention.

Figure 2 is a fragmental longitudinal sectional view through the gun barrel equipped with the ventilated sight rib.

Figure 3 is a sectional view taken on line 3-3 of Fig. 2.

Figure 4 is a sectional view taken on line 44 of Fig. 2.

Figure 5 is a transverse sectional view illustrating the manner of positioning the ventilated sight rib, when used in a double barrel firearm construction.

Referring to the drawing in detail, the reference character 5 indicates the barrel of a firearm, which is provided with a rib 6 extending throughout the length of the barrel, the rib being formed with projections i that are arranged in spaced relation with respect to each other; throughout the length of the rib 6.

The projections 1 are formed with threaded openings 8 to accommodate the threaded shanks 9 of the headed membersjthatsecureitheremoviablesightrib ll]. to the gun barrel.

"The heads 29 10f :these securing members :are circular and are beveled. on'their undersides, ;as :clearly show-n byfFig; 3. of the drawing. When the securingtmembersiareengaged in the threadedopeningso'f the projections :1, the heads there- :of extend =above ithe upper edges ofzthe :projec- .lti'ons.

The sight :rib fllsis provided IWith a :grooveaextended longitudinally thereof, :the groove .being indicated'f=by the reference character H. The groove "I l is :of dovetail fcrmationand ofra. width to accommodate the beveled circularheads Of thesecuring members.

clearly shown by- Fig. 2 of the drawing; the groove I I :terminates at-a point in spaced relat-ion with thesight ends ofthe :barrel, so that the securing member 9 adjacent to :the open outer --endiof the barrel of the firearm, will engage K the shoulder itfl' .formed at the forward end "of the groove, when the sight rib is moved into position restricting rearward movement of the sight rib, when positioned.

The reference character l2 indicates the gun sight, which is secured to the sight rib II).

From the foregoing it will be seen that due to the construction shown and described, ventilating openings 1' are provided throughout the length ofthe sight rib, so that the greater portion of heat waves which usually radiate from the gun barrel, during firing, will be dissipated by passin through the ventilating openings.

It will further be seen that elongational expansion and. contraction of the gun barrel will be permitted without transmitting stress or distortion or damage to the sight rib l0, since the connection between the ventilated sight rib and gun barrel is of a construction to permit of sliding movement of one element with respect to the other.

Referring to Fig. 5 of the drawing, the principle of the invention is carried out in connection with a double-barreled firearm. In this figure the reference character I3 indicates a pair of gun barrels which are connected by means of the usual connecting rib IA.

The permanent rib l5, which supports the removable sight rib I6, is mounted directly on the rib it, between the barrels. The beveled circular heads I! of the securing members are positioned in threaded openings of the rib t5, the heads extending above the rib to fit within the groove of the removable sight rib I6. The openings which receive the securing members are also formed in the projections [9 which are spaced apart, so that spaces between the ribs I and 16, are provided to ventilate the rib.

What is claimed is:

1. In a firearm, a barrel, a rib permanently secured to the barrel, projections rising from the rib and being spaced longitudinally of the rib, said projections having threaded openings formed therein, securing members embodying shanks having threaded ends the threaded ends being engaged in said threaded openings, beveled circular heads formed on the securing members, said heads being extended above the projections, a sight rib having a groove formed in the lower side thereof, said groove extending to one end of the sight rib, the opposite end of the groove terminating in spaced relation with the opposite end of the sight rib, thereby providing a shoulder at one end of the groove, and the heads of the securing members being disposed in the groove, securing the sight rib to the barrel.

2. In a firearm, a'barrel, a rib permanently secured to the barrel, spaced projections formed along the rib, a sight rib resting on the projections providing ventilating openings between the ribs, said sight rib having a longitudinally disposed groove, headed securing members secured to the projections, the heads of the securing members being extended above the projections, said heads being slidable in the groove of the sight rib, securing the sight rib to the barrel, whereby movement of the sight rib with respect to the barrel due to expansion and contraction, is permitted.

3. In a firearm, a barrel, a rib permanently secured to the barrel, spaced projections formed on the rib, securing members extending into the projections, said securing members having heads extended above the projections, a removable sight rib positioned on the projections providing spaces between the ribs for ventilating purposes, said sight rib having a longtudinal groove along its under side, the heads of the securing members being disposed within the groove of the sight rib movably securing the sight rib to the barrel.

4. In a firearm, a barrel, projections rising from the barrel and being disposed in spaced relation with respect to each other, longtudinally of the barrel, securing members held within the projections, beveled circular heads formed on the securing members, a removable sight rib having a groove formed longitudinally thereof, the side walls of the groove being beveled and the beveled heads of the securing members being disposed within the grooves removably securing the sight rib to the barrel.

5. In a firearm, a barrel, a sight rib, means to secure said sight rib to said barrel including a rib member rigidly secured along the top of the barrel, projections extending upwardly from and in spaced relation along said rib member, said projections formed with upwardly opening threaded apertures, the sight rib formed with a dovetail slot along its under side, securing means formed to operatively engage with said dovetail slot and said threaded apertures to releasably secure said sight rib on said barrel.

JOHN CROWE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,323,149 Blizard Nov. 25, 1919 1,323,151 Burton Nov. 25, 1919 1,137,477 Godshalk Apr. 27, 1915 1,029 292 Hoagland June 11, 1912 1,603,761 Gilles Oct. 19, 1926 1,223,476 Coller Apr. 24, 1917 1,160,157 Flues Nov, 16, 1915 

